document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=162351>Question 162351</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Mr. Turner has a motorboat that can travel 14 mph in still water. He wishes to take a trip on a river whose current flows at the rate of 2 mph. If he has 7 hours at his disposal, how many hours should he spend on the first part of his trip going downstream before returning upstream to his starting point? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #119662 by </B><A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><B>ankor@dixie-net.com(22740)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/cgi-bin/show-face.mpl?user=ankor@dixie-net.com><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=119662\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Mr. Turner has a motorboat that can travel 14 mph in still water.<BR>\n" );
document.write( " He wishes to take a trip on a river whose current flows at the rate of 2 mph.<BR>\n" );
document.write( " If he has 7 hours at his disposal, how many hours should he spend on the first<BR>\n" );
document.write( " part of his trip going downstream before returning upstream to his starting point?<BR>\n" );
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document.write( "Let t = time going down-stream<BR>\n" );
document.write( "then<BR>\n" );
document.write( "(7-t) = time going up-stream<BR>\n" );
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document.write( "14 + 2 = 16 mph; boat speed down-stream<BR>\n" );
document.write( "14 - 2 - 12 mph; boat speed up-stream<BR>\n" );
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document.write( "Distance both ways are the same, write a dist equation: dist = speed * time<BR>\n" );
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document.write( "Dist down = dist up<BR>\n" );
document.write( "16t = 12(7-t)<BR>\n" );
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document.write( "16t = 84 - 12t<BR>\n" );
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document.write( "16t + 12t = 84<BR>\n" );
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document.write( "28t = 84<BR>\n" );
document.write( "t = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=84%2F28 ALIGN=MIDDLE  ALT=\"84%2F28\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "t = 3 hrs he can travel down-stream, before he has 4 hrs to return<BR>\n" );
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document.write( "confirm solution by finding the distances down and back:<BR>\n" );
document.write( "16*3 = 48 mi<BR>\n" );
document.write( "12*4 = 48 mi<BR>\n" );
document.write( " </SPAN>\n" );
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